How to determine if a point lies on the diagonal of a square?
如何确定一个点在一个正方形的对角线？
2
Floating point representation, Gaussian elimination with partial pivoting, scaling of computations with matrix size, banded and tri-diagonal systems, LU decomposition.
浮点数表示法，含部份换轴之高斯消去法，使用矩阵大小之计算尺度调整，带状及三角对角系统，LU分解。
3
A new kind of method to put the theodolite on the crossing point of axes directly and use diagonal ocular to ca.